V-shaped Antenna Research Articles

Spin-wave emission using a V-shaped antenna

We investigated the dynamics of spin waves in micro-patterned Permalloy thin films using time-resolved magneto-optic Kerr effect microscopy (TR-MOKE). By applying an external magnetic field, we observe the field dependence of spin wave signals with picosecond resolution. Fourier transform analysis of the signals confirms their agreement with the dispersion relation, demonstrating the successful detection of propagating spin waves using the MOKE technique. Furthermore, we perform dynamic measurements of interfering spin waves generated by a V-shaped antenna. The experimental results reveal differences in spin wave amplitude at each detection point. In combination with simulation analysis based on wave propagation from the V-shaped antenna, we reproduced the experimental results and revealed the existence of a protective zone.

Design and characterization of a meandered V-shaped antenna using characteristics mode analysis and its MIMO configuration for future mmWave devices

This study presents a novel four-element MIMO antenna system designed for the millimeter-wave (mmWave) spectrum. Each MIMO antenna element features a meandered V-shaped radiating structure fed by a 50Ω microstrip line and a partial ground plane with a square notch printed on a 0.254-mm thick RO5880 substrate. The characteristic mode analysis (CMA) of the antenna is done, which reveals that the antenna efficiently utilizes Mode 2, while Modes 1 and 4 also contribute to the resonance, resulting in a wideband response within the mmWave spectrum. A four-element pattern diversity MIMO configuration is developed to evaluate its suitability for MIMO communication, incorporating a connected ground-structure decoupling network to enhance isolation. The MIMO system achieves over 20 dB isolation between elements, with an impedance bandwidth ranging from 20.2 to 33.05 GHz and a peak gain of 6.6 dBi at 28 GHz. Fabrication and measurement validate the design, showing strong agreement with simulations. The MIMO performance metrics, including envelope correlation coefficient (ECC), diversity gain (DG), mean effective gain (MEG), total active reflection coefficient (TARC), and channel capacity loss (CCL), are within acceptable limits, suggesting that the proposed MIMO antenna system is a promising candidate for future mmWave applications.

Investigation and design methods of a compact patch antennas using 3-D MMIC for various applications

This work focused on the design, characterization and investigation of GaAs based multi-layered compact 3D MMIC based antenna. Different patch antennas were designed and characterized along with its S-parameters. Two proposed models of multi-layered patch antenna using V-shaped feeder line and planar feeder line with a spiral transmission line in metal-2 were more compact in size and showed an improvement in performance based on bandwidth compared to the traditional planar feeder line configuration. This implies the proposed planar feed line with the spiral transmission is cost effective. The newly propose planar antenna with a spiral transmission feeder line is 49% more compact in area compared to using the normal planar feeder line. The new design also has wider bandwidth with a bandwidth of 2.99% as compared to the traditional planar with a bandwidth of 1.93%, better input return loss and a slightly lower resonance frequency. Similarly, another multilayer patch antenna was proposed using a V-shaped feeder line, This V-shaped feeder line antenna model showed a much lower resonance frequency (36.50 GHz) compared to normal planar (38.92GHz) and the planar with spiral transmission line model (38.52 GHz).

Far-Field Radiation Prediction and Analysis of a Power Converter With V-Shaped Flat Cables Based on PEEC

The far-field radiation generated by a power electronic converter with V-shaped cables is a key theoretical problem with engineering application significance. The irregular V-shaped antenna is very difficult to calculate analytically, making a precise prediction of the power converter's far-field radiation very challenging. In this work, the far-field radiation of a power converter with flat shielded cables is modeled and predicted using the retarded partial element equivalent circuit ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${\mathbf{\tau}}$</tex-math></inline-formula> PEEC) theory. The τPEEC modified node analysis circuit model of a metal radiator is introduced first, and then the radiator's input impedance formula is deduced. The τPEEC computation model of the V-shaped radiator, which includes the ground plane reflection effect, is developed for the typical far-field radiation test configuration, and the numerical calculation of the far-field radiation transfer function is obtained using the field strength sensor method. To test the suggested τPEEC approach, a 30-MHz low-side buck converter with flat shielded cables is built, and its 10-m far-field radiation strength is predicted. The V-shaped radiator's radiation characteristics are also investigated, and a design for suppression is proposed and demonstrated.

Reconfigurable Radiation Angle Continuous Deflection of All-Dielectric Phase-Change V-Shaped Antenna.

All-dielectric optical antenna with multiple Mie modes and lower inherent ohmic loss can achieve high efficiency of light manipulation. However, the silicon-based optical antenna is not reconfigurable for specific scenarios. The refractive index of optical phase-change materials can be reconfigured under stimulus, and this singular behavior makes it a good candidate for making reconfigurable passive optical devices. Here, the optical radiation characteristics of the V-shaped phase-change antenna are investigated theoretically. The results show that with increasing crystallinity, the maximum radiation direction of the V-shaped phase-change antenna can be continuously deflected by 90°. The exact multipole decomposition analysis reveals that the modulus and interference phase difference of the main multipole moments change with the crystallinity, resulting in a continuous deflection of the maximum radiation direction. Thus, the power ratio in the two vertical radiation directions can be monotonically reversed from −12 to 7 dB between 20% and 80% crystallinity. The V-shaped phase-change antenna exhibits the potential to act as the basic structural unit to construct a reconfigurable passive spatial angular power splitter or wavelength multiplexer. The mechanism analysis of radiation directivity involving the modulus and interference phase difference of the multipole moments will provide a reference for the design and optimization of the phase-change antenna.

A novel miniaturized V-shaped monopole antenna for GSM/WiMAX/WLAN applications

Abstract This paper presents a novel miniaturized triple band V-shaped antenna (VSA). The miniaturization and the triple-band operation are obtained by performing two V-shaped turns on the metallic strip. The proposed antenna is printed on a single FR4 substrate and fed using the coplanar waveguide (CPW) technique. It operates in three frequency bands, [1.6–1.95 GHz], [2.8–4.4 GHz] and [5.4–5.8 GHz], with stable bidirectional radiation patterns in both E- and H-planes. A prototype of the designed antenna is fabricated and tested where the observed good agreement between simulated and experimental results indicates that the proposed structure, having a reasonably compact size of 0 . 0166 λ 0 2 $\text{0}{\text{.}0166\lambda }_{0}^{2}$ , is suitable for GSM [1800 MHz], WiMAX [3.4–3.77 GHz] and WLAN [5.725–5.825 GHz] applications.

V-shaped long wire frequency reconfigurable antenna for WLAN and ISM band applications

In recent days, many slot and patch antennas are being developed for various applications. The proposed work suggests a V-shaped small dimension frequency reconfigurable antenna configuration for WLAN and ISM band applications. The proposed antenna is 16mmx16mm in sizeand is switchable from one frequency band to another. The frequency reconfiguration characteristics of the antenna are achieved by connecting PIN diodes in the ground, thus creates the antenna to switch the frequencies at 5.5–6 GHz (BW = 8.6%, fo = 5.8 GHz), 4.6–5.6 GHz (BW = 18%, fo = 5.3 GHz),4.6–5.7 GHz (BW = 20.7%, fo = 5.3 GHz), 4.6–4.7 GHz (BW = 2%, fo = 4.66 GHz),4.8–5.5 GHz (BW = 13.4 %, fo = 5.2 GHz). The proposed work uses two 4.5 mm width and 0.25 mm length strips respectively and an impedance matching section of 1.75mmx2mm for feeding the antenna. The gain of the antenna can be improved by reducing the ground area to 1 mm. The PIN diode switches can be controlled by DC bias voltage that is applied through RF chokes. The V-shaped long wire microstrip resonant antenna is fabricated and the parameters are measured experimentally. The compared experimental results with simulated results exhibit maximum antenna gain of 6dBi at 5.3GHz and minimum antenna gain of 3.4dBi at 4.66 GHz respectively.

Phase-Controlled Planar Metalenses for High-Resolution Terahertz Focusing

We experimentally demonstrate that high-resolution terahertz focusing can be realized in planar metalenses, which consist of arrays of different V-shaped antenna units on a silicon substrate. Numerical results show that a larger numerical aperture of metalenses can provide smaller full width at half maximum of field distribution, leading to higher spatial resolution. The measurement of fabricated metalenses samples was performed by a terahertz near-field imaging system, and experimental results agree well with the numerical prediction. Especially for 1.1 THz incident light, when the numerical aperture increases from 0.79 to 0.95, the full width at half maximum correspondingly decreases from 343 μm to 206 μm, offering an improvement of spatial resolution.

Compact V-Shaped MIMO Antenna for LTE and 5G Applications

Compact V-Shaped MIMO Antenna for LTE and 5G Applications

Compact V-shaped MIMO Antenna for LTE and 5G Communications

Compact V-shaped MIMO Antenna for LTE and 5G Communications

CPW 급전 이중대역 원형편파 이중 V구조 안테나 설계

CPW 급전 이중대역 원형편파 이중 V구조 안테나 설계

V-Shaped Monopole Antenna with Chichena Itzia Inspired Defected Ground Structure for UWB Applications

Due to rapid growth in wireless communication technology, higher bandwidth requirement for advance telecommunication systems, capable of operating on two or higher bands with higher channel capacities and minimum distortion losses is desired. In this paper, a compact Ultra-Wideband (UWB) V-shaped monopole antenna is presented. UWB response is achieved by modifying the ground plane with Chichen Itzia inspired rectangular staircase shape. The proposed V-shaped is designed by incorporating a rectangle, and an inverted isosceles triangle using FR4 substrate. The size of the antenna is 25 mm×26 mm×1.6 mm. The proposed V-shaped monopole antenna produces bandwidth response of 3 GHz Industrial, Scientific, and Medical (ISM), Worldwide Interoperability for Microwave Access (WiMAX), (IEEE 802.11/HIPERLAN band, 5G sub 6 GHz) which with an additional square cut amplified the bandwidth response up to 8 GHz ranging from 3.1 GHz to 10.6 GHz attaining UWB defined by Federal Communications Commission (FCC) with a maximum gain of 3.83 dB. The antenna is designed in Ansys HFSS. Results for key performance parameters of the antenna are presented. The measured results are in good agreement with the simulated results. Due to flat gain, uniform group delay, omni directional radiation pattern characteristics and well-matched impedance, the proposed antenna is suitable for WiMAX, ISM and heterogeneous wireless systems.

Design and Optimization of V-Shaped Microstrip Patch Antenna with enhanced Bandwidth in Broadband Applications

This paper a compact V- shaped slotted microstrip antenna is designed and utilized in the various communication systems. The most common important parameters are improved .The results of the measured and simulated results for V-slotted microstrip patch antenna has been analyzed . The V slotted patch antenna has been designed to tested in laboratory .The measured and simulated results are exhibits good agreement. The proposed antenna achieved 174MHz of bandwidth at resonance frequency of 2.4 GHz with VSWR ≤ 2. The antenna constructed at centre frequency of 2.44 GHz. The antenna has been designed and simulated using Ansoft HFSS software tools. Then, the antenna parameters are varied in a specific intervals and analysis the designed Patch antenna. Then antenna bandwidth can be enhanced by increasing the substrate thickness. The measured resonant frequency is found 2.592 GHz. The measured value of the bandwidth of the antenna is 75 MHz. Then, the variation of parameters and its performance are investigated.

Anomalous refraction and reflection characteristics of bend V-shaped antenna metasurfaces

Stabilization issue of anomalous refraction and reflection in V-shaped antenna metasurfaces are investigated. Specifically, when a V-shaped metasurface is artificially tilted, the induced refraction and reflection are theoretically analyzed. Detailed numerical and experimental study is then performed for the upward and downward bending metasurfaces. Our results show that although the anomalous reflection is sensitive to the deformation of metasurface geometry; the anomalous refraction is, surprisingly, barely affected by relatively small-angle tilting and able to support perfect beam orienting. Since in real-world applications, the optical objects are often affected by multiple uncertain factors, such as deformation, vibration, non-standard surface, non-perfect planar, etc., the stabilization of optical functionality has therefore been a long-standing design challenge for optical engineering. We believe our findings can shed new light on this stability issue.

Reconfigurable graphene-based V-shaped dipole antenna: From quasi-isotropic to directional radiation pattern

In this paper, a compact reconfigurable V-shaped dipole antenna in THz frequency with two parasitic elements on the substrate of SiO2 is presented. The antenna is designed in the center frequency of 0.95 THz. Designs have been improved based on two modes of antenna radiation pattern: quasi-isotropic and directional pattern. For providing a quasi-isotropic radiation pattern, by making V-form of the dipole, the radiation pattern nulls in the lateral of the antenna is reduced as much as possible although two antenna parasitic elements also affect the antenna radiation pattern. In another mode, only by changing of graphene chemical potential, designing of the directive antenna with the same structure is proposed. In the first mode, physical structure and the angle between dipole arms are more determinative, while in the second mode size and positions of parasitic elements, as well as other mentioned parameters, are effective. In the first mode, quasi-isotropic radiation pattern antenna with changing of antenna gain below than 8 dB, and in the second mode a directional antenna with 5.3 dB maximum gain, and 6 dB F/B ratio is proposed.

Grating ridged waveguide V‐shaped slot array antenna for SATCOM applications

This Letter presents a grating ridged waveguide V-shaped slot array antenna for satellite communication (SATCOM) receiving antenna applications. A special grating ridged waveguide, V-shaped slots and a matching section are applied in the proposed antenna design, so that the antenna provides an extra filtering response with a high radiation polarisation purity in a compact structure. For demonstration, a referential normal ridged waveguide V-shaped slot array antenna is designed and compared. The simulation results show that the proposed antenna not only operates well in the working frequencies (12.25–12.75 GHz) but also provides the antenna gains of lower than − 17.8 dB compared with those of the referential antenna in the interference frequencies (14.0–14.5 GHz).

V-shaped active plasmonic meta-polymers.

We report the design and fabrication of V-shaped plasmonic meta-polymers on a glass substrate or silicon wafer using a surface functionalization approach. The efficacy of the assembly method is examined by analyzing the surface enhanced Raman scattering by an individual V-shaped antenna experimentally and using computational simulations to determine the polarization dependence of local electromagnetic field enhancement.

A Wideband V-Shaped Coplanar Patch Antenna for 2-6 GHz Designed for Energy Harvesting and Wireless Communications

This article portrays a compact wideband coplanar-fed V-shaped antenna. It has been designed for harvesting energy from wireless local area networks (IEEE 802.11) and other wireless communication systems covering the 2–6 GHz frequency band. The Structure of this antenna comprises a rectangular patch and an isosceles trapezoid. A V-shaped slot is introduced on the rectangular patch in order to perturb the surface current path which contributes to the formation of the wide-band characteristics. A trapezoid is inserted between the coplanar feed and the patch for the purpose of impedance matching and resonance shifting. A parametric study has been carried out to understand the effects of various dimensional parameters and to optimize the performance of the antenna. The measurement results which are in agreement with Ansoft HFSS simulation results, showed an agreeable bandwidth and satisfactory characteristics for omnidirectional radiation.

A Terahertz CMOS V-Shaped Patch Antenna with Defected Ground Structure.

In this paper, a V-shaped patch antenna with defected ground structure is proposed at terahertz to overcome the limited performance of a standard complementary metal-oxide semiconductor (CMOS) patch antenna consisting of several metal layers and very thin interdielectric layers. The proposed V-shaped patch with slots allows the increased radiation resistance and broadband performance. In addition, the patch resonating at different frequency from the V-shaped patch is stacked on the top to broaden the impedance-matching bandwidth. More importantly, the slots are formed in the ground plane, which is called the defected ground structure, to further increase the radiation resistance and thus improve the bandwidth and efficiency. It is verified from electromagnetic simulations that the leakage waves from the defected ground can enhance the antenna directivity and gain by coherently interfering with the topside radiation. The proposed on-chip antenna is fabricated using a standard 65 nm CMOS process. The on-wafer measurement shows very wide bandwidth in input reflection coefficient (<−10 dB), greater than 28.7% from 240 to >320 GHz. The measured peak gain was as high as 5.48 dBi at 295 GHz. To the best of the authors’ knowledge, these results belong to the best performance among the terahertz CMOS on-chip antennas without using additional components or processes such as dielectric resonators, lens, or substrate thinning.

Single Asymmetric Plasmonic Antenna as a Directional Coupler to a Dielectric Waveguide

Directional in-coupling of light into a single-mode SixNy waveguide is demonstrated using a single subwavelength asymmetrically shaped metallic nanoantenna. In simulation as well as experiments, we show that at its quadrupolar resonance the V-shaped antenna can couple near-infrared light in the waveguide with a directivity reaching 25 dB. As an ultracompact directional coupler in the near-infrared and visible spectral range, the investigated system constitutes an important building block for integrated nanophotonic circuits and sensors.